One year
Pluto's orbit is highly eccentric. When Pluto is at its minimum distance form the Sun, sunlight takes about 14800 seconds to reach it (just over 4 hours). At its maximum, the light takes about 24600 seconds (nearly 7 hours).
Light years.
It'll probably be easier to reach it if you have a Delorean
450 years.
8 minutes.
8 seconds
On January 19, 2006 a space probe was launched and sent to Pluto. It was expected to reach Pluto in 2015. So it would take about 9 years to get to Pluto.
It will reach pluto in 2014.
Triton is Neptune's moon. However, it takes about 155 min for sunlight to reach Triton.
100 years
According to my calculations 36 minutes
The trip would only take 5.64 seconds to reach Pluto (about 4.7 billion miles) at that speed.